IP Library Granted Patent US 12,533,461
Granted Patent B2
US 12,533,461 · App. 18/160,429 · Granted Jan 27, 2026

Pump mechanism with double reservoir and stationary fluid ports

Inventors: Soroush Kamrava (Everett, MA); Kyle Breingan (Lowell, MA); Maureen McCaffrey (Arlington, MA); Jeffrey Barnes (Medford, MA)
Assignee: INSULET CORPORATION
A61M5/142F04B19/022A61M2005/14252F04B13/00F04B19/22F04B39/0016F04B39/121F04B39/123F04B39/125F04B53/007F04B53/143F04B53/144
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Quick Facts
Patent No.
US 12,533,461
App. No.
18/160,429
Granted
Jan 27, 2026
Kind
B2
Abstract

Disclosed herein is a double reservoir configuration for a pumping mechanism for a drug delivery device wherein one reservoir is rigidly fixed to a housing of the device and the other reservoir moves linearly translates with respect to the fixed reservoir. To avoid having either the input fluid port or the output fluid port moves as the second reservoir linearly translates, one port is in fluid communication with the fixed reservoir and a second fluid port is in communication with the moving reservoir via a hollow tube supporting a static plunger disposed within the moving reservoir. This arrangement provides for the added benefit of allowing air trapped within either of the reservoirs to be almost completely removed as the pump mechanism is filled with the fluid.

Claims (29)

1 . A drug delivery system, comprising:

a pumping mechanism, comprising:

a needle or cannula;

an outer reservoir for storing a liquid drug;

an inner reservoir for storing the liquid drug, configured to be positionable and linearly translatable within the outer reservoir;

a static plunger;

a hollow plunger tube, supporting the static plunger and including an internal fluidic path extending between the inner reservoir and the outer reservoir;

a dispense port for dispensing the liquid drug that is received from the reservoirs via the hollow plunger tube, the dispense port having a structure positioned in the hollow plunger tube that extends between the needle or cannula to the inner reservoir to provide a path to remove air from the inner reservoir;

a fill port for receiving the liquid drug to be stored in the reservoirs liquid drug being transported from the fill port to the inner reservoir via the hollow plunger tube.

2 . The drug delivery system of claim 1 wherein:

the dispense and fill ports remain static as the inner reservoir linearly translates into and out of the outer reservoir.

3 . The drug delivery system of claim 1 wherein the inner reservoir and the outer reservoir move apart as the pumping mechanism is being filled with the liquid drug.

4 . The drug delivery system of claim 1 further comprising:

a fluid seal between an interior surface of the outer reservoir and an exterior surface of the inner reservoir.

5 . The drug delivery system of claim 1 , further comprising:

a fluid seal disposed on a circumferential surface of the static plunger such to seal between the static plunger and an interior surface of the inner reservoir.

6 . The drug delivery system of claim 4 further comprising:

a fluid seal between the hollow plunger tube and an end wall of the inner reservoir.

7 . The drug delivery system of claim 1 wherein the inner reservoir and the outer reservoir have a cross-sectional shape selected from a group consisting of an elliptical cross-sectional shape, a flattened circular cross-sectional shape, and a rectangular cross-sectional shape with rounded corners.

8 . The drug delivery system of claim 1 wherein the hollow plunger tube extends through an end wall of the inner reservoir such as to enable the liquid drug to pass between the inner reservoir and the outer reservoir.

9 . A drug delivery device, comprising:

a pumping mechanism, comprising:

a needle or cannula

an outer reservoir, for storing a drug, rigidly attached to a structure external to the pumping mechanism;

an inner reservoir for storing the drug, configured to linearly translate into and out of the outer reservoir;

a static plunger disposed interior to the inner reservoir;

a hollow plunger tube, supporting the static plunger and including an internal fluidic path extending between the inner reservoir and the outer reservoir;

a dispense port for dispensing the drug received from the reservoirs via the hollow plunger tube, the dispense port having a structure positioned in the hollow plunger tube that extends between the needle or cannula to the inner reservoir to provide a path to remove air from the inner reservoir; and

a fill port for receiving the drug, the drug being transported from the fill port to the inner reservoir via the hollow plunger tube.

Assignments (2)
SECURITY AGREEMENT SUPPLEMENT Recorded Sep 7, 2023
From: INSULET CORPORATION
To: MORGAN STANLEY SENIOR FUNDING, INC., AS COLLATERAL AGENT
Reel/Frame 064840/0181 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 27, 2023
From: KAMRAVA, SOROUSH; BREINGAN, KYLE; MCCAFFREY, MAUREEN; BARNES, JEFFREY
To: INSULET CORPORATION
Reel/Frame 062509/0951 →
Continuity (2)
Provisional Application 63370393 · Aug 4, 2022
Related Publication 20240042126A1 · Feb 8, 2024
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